新型生物滤池在制革废水深度处理工程中的应用

Application of New Biological Filter to Advanced Treatment of Tannery Wastewater

采用一种新型的生物滤池,以制革废水的生化处理出水为研究对象,重点考察了新型滤池对COD和氨氮的去除效果。结果表明,采用两级串联生物滤池深度处理生化处理后的制革废水,当进水COD为300～500 mg/L、氨氮为150～350 mg/L时,出水COD<250 mg/L、氨氮<35mg/L,出水水质能够达到当地的制革行业污染物排放标准,但为确保COD和氨氮同时达到当地的排放要求,建议水力停留时间在24 h以上。

A two-stage in series biological filter was used for advanced treatment of biochemicallytreated tanne~ wastewater. When the influent concentrations of COD and NH3 - N were 300 to 500 mg/L and 150 to 350 mg/L, respectively, the effluent concentrations of COD and NH3 - N were 〈250 mg/L and 〈 35 mg/L, respectively. The effluent quality met the local pollutant discharge standard of the tan- ne~ industry. However, HRT 〉24 h was recommended to ensure that both effluent COD and NH3 - N meet the local discharge requirements.